Bung bushing and closure for sheet-metal containers



Sept. 7 1926. I P. c. HENDERSON BUNG BUSHTNG AND cLosURE FOR SHEET METAL CONTAINERS Filed NOV. 12, 1924 lPatented Sept. 7, 1926i UNITED STATES PETER C. HEDERSON, OF EAST CLEVELANED, OHIO.

BUNG RUSHING AND CLOSURE FOR SHEET-IETAL COTADI'ERS.

Application led November 12, 1924. Serial No. 749,445.

This invention relates to an improved bushing, in some cases known as 'a bung bushing, for use with sheet metal containers such as drums, barrels, tanks and the like, and to a closure therefor; and its objects are to provide an inexpensive yet highly eflicient 'device of this character that is simple of construction and is convenient of attachment to sheet metal walls, is so designed as to compensate for such slight irregularities as are liable to be attendant upon quantity production, and whose manufacture and installation are adapted to prevailing practice.

In furtherance of certain of the foregoing objects, the device is made of sheet metal, as illustrated in the accompanying drawing wherein Fig. 1 is a sectional view through my improved bushing and closure 20. applied to a sheet metal wall; Fig. 2 is an outside view, and Fig.; 3 an inside view, of what is shown in Fig. l1; Fi 4 is a central sectionA through the bus ling showing its lcondition before being applied to a wall;

Fig. 5 is a similar view ofthe bushing, illustrating the first step in applying the same to a wall; Fig. 6 is a central section through the Kbushing showing its condition when applied to a wall, the wall in this view 30 being indicated in dot and dash lines; Fig.

7 is a sectional detail on the line 7-7 of Fig. 6;*and Fig-8 is a view, similar to Fig.

6 but omitting the wall, of a modified form of the invention.

As above stated, my improved bushing is intended for use Wlth sheet. metal containers and the wall of such a container is designated 1 in the drawing. Preparatory to applying the bushing to the wall 1, the wall is punched to provide an opening and the material4 about said opening is drawnto form a cylindrical flange 2 that is fiared slightly at its inner end.

The bushing, which is drawn from sheet metal of a suitable thickness, comprises a neck 3 and a base 4 that extends outwardly from one end of the neck, anda plurality of lugs 5 which project `from the edge of the base. To facilitate the bending of the lugs and the application of the bushing to the flange 2 of" the wall 1, in the manner presentl to be described, the lines along wi ich Vt e lugs are bent. are straight, an this imparts to the base 4 a hexagonal shape, as shown in Fig. .3, due to the fact that there are six lugs embodiedin the present design. The shape would be changed, of

course, by increasing or reducing the number of lugs. n F ormed within the surface of` 2, as illustrated in Fig.` 5, the parts are compressed, as by means of a suitable machine, which causes the lugs 5 to be forced inwardly and downwardly and the inner end of the fiange 2 outwardly so that the said inner end of the flange is clamped between the lugs and the base, while portions of t-he flange are displaced by the ribs 7 into the grooves 6, this condition bein illustrated in Figs. 1, 6 and 7. The bus ingis thus effectively locked against turning with respect to the wall.

The neck 3 is internally threaded for the reception of the threaded inner end of a closure or Plug 8 which is preferably formed of sheetmetal and is provided, at its outer endwith a flange 9 on the inner surface of which is formed an annular rib 10. The iange 9 is so shaped as to adapt it to the reception of a wrench, the same being shown as hexagonal in the present instance. A gasket 11 of suitable'packing material is inserted between the iiange 9 and the adjacent surface of the wall 1, and when the closure or plu 8 is screwed into the neck 3 the annular r1b 10 embeds itself into the gasket thereby to effect a leakvproof joint between the fiange and gasket,

the gasket in turn, being pressed -with a leak-tight"iit against the wall 1. By providing the rib 10, the -plug or closure may be tilted slightly with respect to the surface of the wall and yet the joint will be leakproof by reason of the fact that the rib is embedded within the gasket entirely throughout its circumference, a little less on one side than on the other, however, and the gasket is pressed with substantially the -same degree of-pressure all the way around against the wall 1. This feature insures a tight joint notwithstanding kslight irregularities which are liable to occur in the manufacture of -the bushings and in their application to the walls of containers.

In the modification illustrated in Fig. 8,

an annular groove 6x1 is substituted for the radial grooves 6 of the previously described form, and arcuate beads 7, on the lugs 5, cooperate with said groove.

Having thus described my invention, what I claim is: v

1f. In combination, a sheet metal wall having an opening and a lange surrounding said opening, and a bushing comprising a neck and a base at one end of the neck and a plurality of lugs extending inwardly and over the base from the outer edge thereof, the inner end of the aforesaid ange being flared outwardly and clamped between the base and said lugs, the base and lugs having, on the one hand radial grooves, and on the other, ribs which mate with said grooves, the ribs serving to project parts of Said flange into the grooves when the parts are pressed together.

2. In combination, a sheet metal wall having an opening and a flange surrounding said opening, and a bushing comprising a neck and a base at one end of the neck and` a plurality of lugs extending inwardly and over the base from the outer edge thereof, the inner end of the aforesaid flange being flared outwardly and clamped between the basey and said lugs, the base having radial grooves and the lugs having ribs that mate with said grooves and serve to project parts of the llange into the grooves when the parts are pressed together.

3. In combination, a sheet metal wall having an opening and a flange surrounding said opening, and a bushing comprising a neck and a base at one end of the neck and a pluralityof relatively wide lugs bentalong substantially straight lines inwardly and over the base from the outer edge thereof, the adjacent ends of adjoining lugs meeting on substantially radial lines, the inner end of the A aforesaid flange being flared out-- Wardly and clamped between the base and said lugs. i

4. In combination, a sheet metal wall having an opening and a cylindrical flange surrounding said opening, and a bushing comprising a neck and a base at one end of the neck and a plurality of lugs extending inwardly and over the base from the outer edge thereof, the lateral edges of adjacent lugs meeting on substantially radial lines, the inner ends of said lugs being curved and collectively forming a circular opening through which the aforesaid flange eX- tends. the inner end of said flange being flared outwardly and clamped between the base and said lugs.

In testimony whereof, I hereunto aliX my signature.

PETER C. HENDERSON. 

